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Stage assembly with measurement system initialization, vibration compensation, low transmissibility, and lightweight fine stage

  • US 7,417,714 B2
  • Filed: 10/24/2005
  • Issued: 08/26/2008
  • Est. Priority Date: 11/02/2004
  • Status: Active Grant
First Claim
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1. A stage assembly that positions a work piece about a first axis, the stage assembly comprising:

  • a first stage;

    a second stage that retains the work piece;

    a second mover assembly that moves the second stage relative to the first stage about the first axis;

    a measurement system that monitors the position of the second stage about the first axis when the second stage is positioned within a FA working range about the first axis; and

    an initialization system that facilitates positioning of the second stage about the first axis when the second stage is rotated about the first axis outside the FA working range.

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